From: Iain Patterson <me@iain.cx>
Date: Sat, 23 Nov 2013 15:21:54 +0000 (+0000)
Subject: Allow compiling as a Unicode application.
X-Git-Tag: v2.22~137
X-Git-Url: http://git.iain.cx/?a=commitdiff_plain;h=5b9e64a9ae1fbf1254c9c246e5b123d3aa77a37a;p=nssm.git

Allow compiling as a Unicode application.

Overhaul the entire codebase so that it compiles and runs as either a
Unicode or ANSI application.
---

diff --git a/event.cpp b/event.cpp
index 32e4acf..bd06363 100644
--- a/event.cpp
+++ b/event.cpp
@@ -5,27 +5,27 @@
 unsigned long tls_index;
 
 /* Convert error code to error string - must call LocalFree() on return value */
-char *error_string(unsigned long error) {
+TCHAR *error_string(unsigned long error) {
   /* Thread-safe buffer */
-  char *error_message = (char *) TlsGetValue(tls_index);
+  TCHAR *error_message = (TCHAR *) TlsGetValue(tls_index);
   if (! error_message) {
-    error_message = (char *) LocalAlloc(LPTR, NSSM_ERROR_BUFSIZE);
-    if (! error_message) return "<out of memory for error message>";
+    error_message = (TCHAR *) LocalAlloc(LPTR, NSSM_ERROR_BUFSIZE);
+    if (! error_message) return _T("<out of memory for error message>");
     TlsSetValue(tls_index, (void *) error_message);
   }
 
-  if (! FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (char *) error_message, NSSM_ERROR_BUFSIZE, 0)) {
-    if (_snprintf_s(error_message, NSSM_ERROR_BUFSIZE, _TRUNCATE, "system error %lu", error) < 0) return 0;
+  if (! FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (TCHAR *) error_message, NSSM_ERROR_BUFSIZE, 0)) {
+    if (_sntprintf_s(error_message, NSSM_ERROR_BUFSIZE, _TRUNCATE, _T("system error %lu"), error) < 0) return 0;
   }
   return error_message;
 }
 
 /* Convert message code to format string */
-char *message_string(unsigned long error) {
-  char *ret;
-  if (! FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR) &ret, NSSM_ERROR_BUFSIZE, 0)) {
-    ret = (char *) HeapAlloc(GetProcessHeap(), 0, 32);
-    if (_snprintf_s(ret, NSSM_ERROR_BUFSIZE, _TRUNCATE, "system error %lu", error) < 0) return 0;
+TCHAR *message_string(unsigned long error) {
+  TCHAR *ret;
+  if (! FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &ret, NSSM_ERROR_BUFSIZE, 0)) {
+    ret = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, 32 * sizeof(TCHAR));
+    if (_sntprintf_s(ret, NSSM_ERROR_BUFSIZE, _TRUNCATE, _T("system error %lu"), error) < 0) return 0;
   }
   return ret;
 }
@@ -34,20 +34,20 @@ char *message_string(unsigned long error) {
 void log_event(unsigned short type, unsigned long id, ...) {
   va_list arg;
   int count;
-  char *s;
-  char *strings[NSSM_NUM_EVENT_STRINGS];
+  TCHAR *s;
+  TCHAR *strings[NSSM_NUM_EVENT_STRINGS];
 
   /* Open event log */
-  HANDLE handle = RegisterEventSource(0, TEXT(NSSM));
+  HANDLE handle = RegisterEventSource(0, NSSM);
   if (! handle) return;
 
   /* Log it */
   count = 0;
   va_start(arg, id);
-  while ((s = va_arg(arg, char *)) && count < NSSM_NUM_EVENT_STRINGS - 1) strings[count++] = s;
+  while ((s = va_arg(arg, TCHAR *)) && count < NSSM_NUM_EVENT_STRINGS - 1) strings[count++] = s;
   strings[count] = 0;
   va_end(arg);
-  ReportEvent(handle, type, 0, id, 0, count, 0, (const char **) strings, 0);
+  ReportEvent(handle, type, 0, id, 0, count, 0, (const TCHAR **) strings, 0);
 
   /* Close event log */
   DeregisterEventSource(handle);
@@ -57,11 +57,11 @@ void log_event(unsigned short type, unsigned long id, ...) {
 void print_message(FILE *file, unsigned long id, ...) {
   va_list arg;
 
-  char *format = message_string(id);
+  TCHAR *format = message_string(id);
   if (! format) return;
 
   va_start(arg, id);
-  vfprintf(file, format, arg);
+  _vftprintf(file, format, arg);
   va_end(arg);
 
   LocalFree(format);
@@ -71,17 +71,17 @@ void print_message(FILE *file, unsigned long id, ...) {
 int popup_message(unsigned int type, unsigned long id, ...) {
   va_list arg;
 
-  char *format = message_string(id);
+  TCHAR *format = message_string(id);
   if (! format) {
-    return MessageBox(0, "Message %lu was supposed to go here!", NSSM, MB_OK | MB_ICONEXCLAMATION);
+    return MessageBox(0, _T("Message %lu was supposed to go here!"), NSSM, MB_OK | MB_ICONEXCLAMATION);
   }
 
-  char blurb[256];
+  TCHAR blurb[256];
   va_start(arg, id);
-  if (vsnprintf_s(blurb, sizeof(blurb), _TRUNCATE, format, arg) < 0) {
+  if (_vsntprintf_s(blurb, sizeof(blurb), _TRUNCATE, format, arg) < 0) {
     va_end(arg);
     LocalFree(format);
-    return MessageBox(0, "Message %lu was supposed to go here!", NSSM, MB_OK | MB_ICONEXCLAMATION);
+    return MessageBox(0, _T("Message %lu was supposed to go here!"), NSSM, MB_OK | MB_ICONEXCLAMATION);
   }
   va_end(arg);
 
diff --git a/event.h b/event.h
index 976075f..849a347 100644
--- a/event.h
+++ b/event.h
@@ -1,8 +1,8 @@
 #ifndef EVENT_H
 #define EVENT_H
 
-char *error_string(unsigned long);
-char *message_string(unsigned long);
+TCHAR *error_string(unsigned long);
+TCHAR *message_string(unsigned long);
 void log_event(unsigned short, unsigned long, ...);
 void print_message(FILE *, unsigned long, ...);
 int popup_message(unsigned int, unsigned long, ...);
diff --git a/gui.cpp b/gui.cpp
index 9c5c57d..1c77bfc 100644
--- a/gui.cpp
+++ b/gui.cpp
@@ -4,7 +4,7 @@ static enum { NSSM_TAB_APPLICATION, NSSM_TAB_SHUTDOWN, NSSM_TAB_EXIT, NSSM_TAB_I
 static HWND tablist[NSSM_NUM_TABS];
 static int selected_tab;
 
-int nssm_gui(int resource, char *name) {
+int nssm_gui(int resource, TCHAR *name) {
   /* Create window */
   HWND dlg = CreateDialog(0, MAKEINTRESOURCE(resource), 0, install_dlg);
   if (! dlg) {
@@ -74,7 +74,7 @@ static inline void check_method_timeout(HWND tab, unsigned long control, unsigne
   if (translated) *timeout = configured;
 }
 
-static inline void check_io(char *name, char *buffer, size_t bufsize, unsigned long control) {
+static inline void check_io(TCHAR *name, TCHAR *buffer, size_t bufsize, unsigned long control) {
   if (! SendMessage(GetDlgItem(tablist[NSSM_TAB_IO], control), WM_GETTEXTLENGTH, 0, 0)) return;
   if (GetDlgItemText(tablist[NSSM_TAB_IO], control, buffer, (int) bufsize)) return;
   popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_MESSAGE_PATH_TOO_LONG, name);
@@ -104,7 +104,7 @@ int install(HWND window) {
 
     /* Get startup directory. */
     if (! GetDlgItemText(tablist[NSSM_TAB_APPLICATION], IDC_DIR, service->dir, sizeof(service->dir))) {
-      memmove(service->dir, service->exe, sizeof(service->dir));
+      _sntprintf_s(service->dir, _countof(service->dir), _TRUNCATE, _T("%s"), service->exe);
       strip_basename(service->dir);
     }
 
@@ -132,9 +132,9 @@ int install(HWND window) {
     if (service->default_exit_action == CB_ERR) service->default_exit_action = 0;
 
     /* Get I/O stuff. */
-    check_io("stdin", service->stdin_path, sizeof(service->stdin_path), IDC_STDIN);
-    check_io("stdout", service->stdout_path, sizeof(service->stdout_path), IDC_STDOUT);
-    check_io("stderr", service->stderr_path, sizeof(service->stderr_path), IDC_STDERR);
+    check_io(_T("stdin"), service->stdin_path, sizeof(service->stdin_path), IDC_STDIN);
+    check_io(_T("stdout"), service->stdout_path, sizeof(service->stdout_path), IDC_STDOUT);
+    check_io(_T("stderr"), service->stderr_path, sizeof(service->stderr_path), IDC_STDERR);
     /* Override stdout and/or stderr. */
     if (SendDlgItemMessage(tablist[NSSM_TAB_IO], IDC_TRUNCATE, BM_GETCHECK, 0, 0) & BST_CHECKED) {
       if (service->stdout_path[0]) service->stdout_disposition = CREATE_ALWAYS;
@@ -144,9 +144,9 @@ int install(HWND window) {
     /* Get environment. */
     unsigned long envlen = (unsigned long) SendMessage(GetDlgItem(tablist[NSSM_TAB_ENVIRONMENT], IDC_ENVIRONMENT), WM_GETTEXTLENGTH, 0, 0);
     if (envlen) {
-      char *env = (char *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, envlen + 2);
+      TCHAR *env = (TCHAR *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (envlen + 2) * sizeof(TCHAR));
       if (! env) {
-        popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, "environment", "install()");
+        popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, _T("environment"), _T("install()"));
         cleanup_nssm_service(service);
         return 5;
       }
@@ -161,21 +161,21 @@ int install(HWND window) {
       /* Strip CR and replace LF with NULL. */
       unsigned long newlen = 0;
       unsigned long i, j;
-      for (i = 0; i < envlen; i++) if (env[i] != '\r') newlen++;
+      for (i = 0; i < envlen; i++) if (env[i] != _T('\r')) newlen++;
       /* Must end with two NULLs. */
       newlen += 2;
 
-      char *newenv = (char *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, newlen);
+      TCHAR *newenv = (TCHAR *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, newlen * sizeof(TCHAR));
       if (! newenv) {
         HeapFree(GetProcessHeap(), 0, env);
-        popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, "environment", "install()");
+        popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, _T("environment"), _T("install()"));
         cleanup_nssm_service(service);
         return 5;
       }
 
       for (i = 0, j = 0; i < envlen; i++) {
-        if (env[i] == '\r') continue;
-        if (env[i] == '\n') newenv[j] = '\0';
+        if (env[i] == _T('\r')) continue;
+        if (env[i] == _T('\n')) newenv[j] = _T('\0');
         else newenv[j] = env[i];
         j++;
       }
@@ -185,15 +185,19 @@ int install(HWND window) {
       envlen = newlen;
 
       /* Test the environment is valid. */
-      char path[MAX_PATH];
-      GetModuleFileName(0, path, sizeof(path));
+      TCHAR path[MAX_PATH];
+      GetModuleFileName(0, path, _countof(path));
       STARTUPINFO si;
       ZeroMemory(&si, sizeof(si));
       si.cb = sizeof(si);
       PROCESS_INFORMATION pi;
       ZeroMemory(&pi, sizeof(pi));
+      unsigned long flags = CREATE_SUSPENDED;
+#ifdef UNICODE
+      flags |= CREATE_UNICODE_ENVIRONMENT;
+#endif
 
-      if (! CreateProcess(0, path, 0, 0, 0, CREATE_SUSPENDED, env, 0, &si, &pi)) {
+      if (! CreateProcess(0, path, 0, 0, 0, flags, env, 0, &si, &pi)) {
         unsigned long error = GetLastError();
         if (error == ERROR_INVALID_PARAMETER) {
           popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_GUI_INVALID_ENVIRONMENT);
@@ -219,7 +223,7 @@ int install(HWND window) {
   /* See if it works. */
   switch (install_service(service)) {
     case 1:
-      popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, "service", "install()");
+      popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, _T("service"), _T("install()"));
       cleanup_nssm_service(service);
       return 1;
 
@@ -277,7 +281,7 @@ int remove(HWND window) {
 
   switch (remove_service(service)) {
     case 1:
-      popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, "service", "remove()");
+      popup_message(MB_OK | MB_ICONEXCLAMATION, NSSM_EVENT_OUT_OF_MEMORY, _T("service"), _T("remove()"));
       cleanup_nssm_service(service);
       return 1;
 
@@ -302,12 +306,12 @@ int remove(HWND window) {
   return 0;
 }
 
-static char *browse_filter(int message) {
+static TCHAR *browse_filter(int message) {
   switch (message) {
-    case NSSM_GUI_BROWSE_FILTER_APPLICATIONS: return "*.exe;*.bat;*.cmd";
-    case NSSM_GUI_BROWSE_FILTER_DIRECTORIES: return ".";
+    case NSSM_GUI_BROWSE_FILTER_APPLICATIONS: return _T("*.exe;*.bat;*.cmd");
+    case NSSM_GUI_BROWSE_FILTER_DIRECTORIES: return _T(".");
     case NSSM_GUI_BROWSE_FILTER_ALL_FILES: /* Fall through. */
-    default: return "*.*";
+    default: return _T("*.*");
   }
 }
 
@@ -321,7 +325,7 @@ UINT_PTR CALLBACK browse_hook(HWND dlg, UINT message, WPARAM w, LPARAM l) {
 }
 
 /* Browse for application */
-void browse(HWND window, char *current, unsigned long flags, ...) {
+void browse(HWND window, TCHAR *current, unsigned long flags, ...) {
   if (! window) return;
 
   va_list arg;
@@ -332,7 +336,7 @@ void browse(HWND window, char *current, unsigned long flags, ...) {
   OPENFILENAME ofn;
   ZeroMemory(&ofn, sizeof(ofn));
   ofn.lStructSize = sizeof(ofn);
-  ofn.lpstrFilter = (char *) HeapAlloc(GetProcessHeap(), 0, bufsize);
+  ofn.lpstrFilter = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, bufsize * sizeof(TCHAR));
   /* XXX: Escaping nulls with FormatMessage is tricky */
   if (ofn.lpstrFilter) {
     ZeroMemory((void *) ofn.lpstrFilter, bufsize);
@@ -340,23 +344,23 @@ void browse(HWND window, char *current, unsigned long flags, ...) {
     /* "Applications" + NULL + "*.exe" + NULL */
     va_start(arg, flags);
     while (i = va_arg(arg, int)) {
-      char *localised = message_string(i);
-      _snprintf_s((char *) ofn.lpstrFilter + len, bufsize, _TRUNCATE, localised);
-      len += strlen(localised) + 1;
+      TCHAR *localised = message_string(i);
+      _sntprintf_s((TCHAR *) ofn.lpstrFilter + len, bufsize, _TRUNCATE, localised);
+      len += _tcslen(localised) + 1;
       LocalFree(localised);
-      char *filter = browse_filter(i);
-      _snprintf_s((char *) ofn.lpstrFilter + len, bufsize - len, _TRUNCATE, "%s", filter);
-      len += strlen(filter) + 1;
+      TCHAR *filter = browse_filter(i);
+      _sntprintf_s((TCHAR *) ofn.lpstrFilter + len, bufsize - len, _TRUNCATE, _T("%s"), filter);
+      len += _tcslen(filter) + 1;
     }
     va_end(arg);
     /* Remainder of the buffer is already zeroed */
   }
-  ofn.lpstrFile = new char[MAX_PATH];
+  ofn.lpstrFile = new TCHAR[MAX_PATH];
   if (flags & OFN_NOVALIDATE) {
     /* Directory hack. */
-    _snprintf_s(ofn.lpstrFile, MAX_PATH, _TRUNCATE, ":%s:", message_string(NSSM_GUI_BROWSE_FILTER_DIRECTORIES));
+    _sntprintf_s(ofn.lpstrFile, MAX_PATH, _TRUNCATE, _T(":%s:"), message_string(NSSM_GUI_BROWSE_FILTER_DIRECTORIES));
   }
-  else _snprintf_s(ofn.lpstrFile, MAX_PATH, _TRUNCATE, "%s", current);
+  else _sntprintf_s(ofn.lpstrFile, MAX_PATH, _TRUNCATE, _T("%s"), current);
   ofn.lpstrTitle = message_string(NSSM_GUI_BROWSE_TITLE);
   ofn.nMaxFile = MAX_PATH;
   ofn.Flags = OFN_EXPLORER | OFN_HIDEREADONLY | OFN_PATHMUSTEXIST | flags;
@@ -379,7 +383,7 @@ INT_PTR CALLBACK tab_dlg(HWND tab, UINT message, WPARAM w, LPARAM l) {
     /* Button was pressed or control was controlled. */
     case WM_COMMAND:
       HWND dlg;
-      char buffer[MAX_PATH];
+      TCHAR buffer[MAX_PATH];
 
       switch (LOWORD(w)) {
         /* Browse for application. */
@@ -455,14 +459,14 @@ INT_PTR CALLBACK install_dlg(HWND window, UINT message, WPARAM w, LPARAM l) {
 
       /* Application tab. */
       tab.pszText = message_string(NSSM_GUI_TAB_APPLICATION);
-      tab.cchTextMax = (int) strlen(tab.pszText);
+      tab.cchTextMax = (int) _tcslen(tab.pszText);
       SendMessage(tabs, TCM_INSERTITEM, NSSM_TAB_APPLICATION, (LPARAM) &tab);
       tablist[NSSM_TAB_APPLICATION] = CreateDialog(0, MAKEINTRESOURCE(IDD_APPLICATION), window, tab_dlg);
       ShowWindow(tablist[NSSM_TAB_APPLICATION], SW_SHOW);
 
       /* Shutdown tab. */
       tab.pszText = message_string(NSSM_GUI_TAB_SHUTDOWN);
-      tab.cchTextMax = (int) strlen(tab.pszText);
+      tab.cchTextMax = (int) _tcslen(tab.pszText);
       SendMessage(tabs, TCM_INSERTITEM, NSSM_TAB_SHUTDOWN, (LPARAM) &tab);
       tablist[NSSM_TAB_SHUTDOWN] = CreateDialog(0, MAKEINTRESOURCE(IDD_SHUTDOWN), window, tab_dlg);
       ShowWindow(tablist[NSSM_TAB_SHUTDOWN], SW_HIDE);
@@ -478,7 +482,7 @@ INT_PTR CALLBACK install_dlg(HWND window, UINT message, WPARAM w, LPARAM l) {
 
       /* Restart tab. */
       tab.pszText = message_string(NSSM_GUI_TAB_EXIT);
-      tab.cchTextMax = (int) strlen(tab.pszText);
+      tab.cchTextMax = (int) _tcslen(tab.pszText);
       SendMessage(tabs, TCM_INSERTITEM, NSSM_TAB_EXIT, (LPARAM) &tab);
       tablist[NSSM_TAB_EXIT] = CreateDialog(0, MAKEINTRESOURCE(IDD_APPEXIT), window, tab_dlg);
       ShowWindow(tablist[NSSM_TAB_EXIT], SW_HIDE);
@@ -494,14 +498,14 @@ INT_PTR CALLBACK install_dlg(HWND window, UINT message, WPARAM w, LPARAM l) {
 
       /* I/O tab. */
       tab.pszText = message_string(NSSM_GUI_TAB_IO);
-      tab.cchTextMax = (int) strlen(tab.pszText) + 1;
+      tab.cchTextMax = (int) _tcslen(tab.pszText) + 1;
       SendMessage(tabs, TCM_INSERTITEM, NSSM_TAB_IO, (LPARAM) &tab);
       tablist[NSSM_TAB_IO] = CreateDialog(0, MAKEINTRESOURCE(IDD_IO), window, tab_dlg);
       ShowWindow(tablist[NSSM_TAB_IO], SW_HIDE);
 
       /* Environment tab. */
       tab.pszText = message_string(NSSM_GUI_TAB_ENVIRONMENT);
-      tab.cchTextMax = (int) strlen(tab.pszText) + 1;
+      tab.cchTextMax = (int) _tcslen(tab.pszText) + 1;
       SendMessage(tabs, TCM_INSERTITEM, NSSM_TAB_ENVIRONMENT, (LPARAM) &tab);
       tablist[NSSM_TAB_ENVIRONMENT] = CreateDialog(0, MAKEINTRESOURCE(IDD_ENVIRONMENT), window, tab_dlg);
       ShowWindow(tablist[NSSM_TAB_ENVIRONMENT], SW_HIDE);
diff --git a/gui.h b/gui.h
index 805635d..ad6bc56 100644
--- a/gui.h
+++ b/gui.h
@@ -6,7 +6,7 @@
 #include <commctrl.h>
 #include "resource.h"
 
-int nssm_gui(int, char *);
+int nssm_gui(int, TCHAR *);
 void centre_window(HWND);
 int install(HWND);
 int remove(HWND);
diff --git a/imports.cpp b/imports.cpp
index 99661be..68a5c7b 100644
--- a/imports.cpp
+++ b/imports.cpp
@@ -9,7 +9,7 @@ imports_t imports;
   absolutely need.  If we later add some indispensible imports we can
   return non-zero here to force an application exit.
 */
-HMODULE get_dll(const char *dll, unsigned long *error) {
+HMODULE get_dll(const TCHAR *dll, unsigned long *error) {
   *error = 0;
 
   HMODULE ret = LoadLibrary(dll);
@@ -38,7 +38,7 @@ int get_imports() {
 
   ZeroMemory(&imports, sizeof(imports));
 
-  imports.kernel32 = get_dll("kernel32.dll", &error);
+  imports.kernel32 = get_dll(_T("kernel32.dll"), &error);
   if (imports.kernel32) {
     imports.AttachConsole = (AttachConsole_ptr) get_import(imports.kernel32, "AttachConsole", &error);
     if (! imports.AttachConsole) {
diff --git a/imports.h b/imports.h
index 33dbc19..8b36778 100644
--- a/imports.h
+++ b/imports.h
@@ -12,7 +12,7 @@ typedef struct {
   WakeConditionVariable_ptr WakeConditionVariable;
 } imports_t;
 
-HMODULE get_dll(const char *, unsigned long *);
+HMODULE get_dll(const TCHAR *, unsigned long *);
 FARPROC get_import(HMODULE, const char *, unsigned long *);
 int get_imports();
 void free_imports();
diff --git a/io.cpp b/io.cpp
index 0ab92c3..501f605 100644
--- a/io.cpp
+++ b/io.cpp
@@ -1,12 +1,12 @@
 #include "nssm.h"
 
 /* Get path, share mode, creation disposition and flags for a stream. */
-int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long *sharing, unsigned long default_sharing, unsigned long *disposition, unsigned long default_disposition, unsigned long *flags, unsigned long default_flags) {
-  char value[NSSM_STDIO_LENGTH];
+int get_createfile_parameters(HKEY key, TCHAR *prefix, TCHAR *path, unsigned long *sharing, unsigned long default_sharing, unsigned long *disposition, unsigned long default_disposition, unsigned long *flags, unsigned long default_flags) {
+  TCHAR value[NSSM_STDIO_LENGTH];
 
   /* Path. */
-  if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s", prefix) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, "get_createfile_parameters()", 0);
+  if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s"), prefix) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, prefix, _T("get_createfile_parameters()"), 0);
     return 1;
   }
   switch (expand_parameter(key, value, path, MAX_PATH, true, false)) {
@@ -15,8 +15,8 @@ int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long
   }
 
   /* ShareMode. */
-  if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_SHARING) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, "get_createfile_parameters()", 0);
+  if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_SHARING) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_SHARING, _T("get_createfile_parameters()"), 0);
     return 3;
   }
   switch (get_number(key, value, sharing, false)) {
@@ -26,8 +26,8 @@ int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long
   }
 
   /* CreationDisposition. */
-  if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, "get_createfile_parameters()", 0);
+  if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_DISPOSITION) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_DISPOSITION, _T("get_createfile_parameters()"), 0);
     return 5;
   }
   switch (get_number(key, value, disposition, false)) {
@@ -37,8 +37,8 @@ int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long
   }
 
   /* Flags. */
-  if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, NSSM_REG_STDIO_FLAGS) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, "get_createfile_parameters()", 0);
+  if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, NSSM_REG_STDIO_FLAGS) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, NSSM_REG_STDIO_FLAGS, _T("get_createfile_parameters()"), 0);
     return 7;
   }
   switch (get_number(key, value, flags, false)) {
@@ -50,18 +50,18 @@ int get_createfile_parameters(HKEY key, char *prefix, char *path, unsigned long
   return 0;
 }
 
-int set_createfile_parameter(HKEY key, char *prefix, char *suffix, unsigned long number) {
-  char value[NSSM_STDIO_LENGTH];
+int set_createfile_parameter(HKEY key, TCHAR *prefix, TCHAR *suffix, unsigned long number) {
+  TCHAR value[NSSM_STDIO_LENGTH];
 
-  if (_snprintf_s(value, sizeof(value), _TRUNCATE, "%s%s", prefix, suffix) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, "set_createfile_parameter()", 0);
+  if (_sntprintf_s(value, _countof(value), _TRUNCATE, _T("%s%s"), prefix, suffix) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, suffix, _T("set_createfile_parameter()"), 0);
     return 1;
   }
 
   return set_number(key, value, number);
 }
 
-HANDLE append_to_file(char *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
+HANDLE append_to_file(TCHAR *path, unsigned long sharing, SECURITY_ATTRIBUTES *attributes, unsigned long disposition, unsigned long flags) {
   HANDLE ret;
 
   /* Try to append to the file first. */
@@ -82,8 +82,8 @@ HANDLE append_to_file(char *path, unsigned long sharing, SECURITY_ATTRIBUTES *at
 }
 
 int get_output_handles(HKEY key, STARTUPINFO *si) {
-  char path[MAX_PATH];
-  char stdout_path[MAX_PATH];
+  TCHAR path[MAX_PATH];
+  TCHAR stdout_path[MAX_PATH];
   unsigned long sharing, disposition, flags;
   bool set_flags = false;
 
@@ -107,8 +107,8 @@ int get_output_handles(HKEY key, STARTUPINFO *si) {
   if (get_createfile_parameters(key, NSSM_REG_STDOUT, path, &sharing, NSSM_STDOUT_SHARING, &disposition, NSSM_STDOUT_DISPOSITION, &flags, NSSM_STDOUT_FLAGS)) return 3;
   if (path[0]) {
     /* Remember path for comparison with stderr. */
-    if (_snprintf_s(stdout_path, sizeof(stdout_path), _TRUNCATE, "%s", path) < 0) {
-      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "stdout_path", "get_output_handles", 0);
+    if (_sntprintf_s(stdout_path, _countof(stdout_path), _TRUNCATE, _T("%s"), path) < 0) {
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("stdout_path"), _T("get_output_handles"), 0);
       return 4;
     }
 
diff --git a/io.h b/io.h
index 1abaf1b..5b9e8ca 100644
--- a/io.h
+++ b/io.h
@@ -11,9 +11,9 @@
 #define NSSM_STDERR_DISPOSITION OPEN_ALWAYS
 #define NSSM_STDERR_FLAGS FILE_ATTRIBUTE_NORMAL
 
-int get_createfile_parameters(HKEY, char *, char *, unsigned long *, unsigned long, unsigned long *, unsigned long, unsigned long *, unsigned long);
-int set_createfile_parameter(HKEY, char *, char *, unsigned long);
-HANDLE append_to_file(char *, unsigned long, SECURITY_ATTRIBUTES *, unsigned long, unsigned long);
+int get_createfile_parameters(HKEY, TCHAR *, TCHAR *, unsigned long *, unsigned long, unsigned long *, unsigned long, unsigned long *, unsigned long);
+int set_createfile_parameter(HKEY, TCHAR *, TCHAR *, unsigned long);
+HANDLE append_to_file(TCHAR *, unsigned long, SECURITY_ATTRIBUTES *, unsigned long, unsigned long);
 int get_output_handles(HKEY, STARTUPINFO *);
 void close_output_handles(STARTUPINFO *);
 
diff --git a/messages.mc b/messages.mc
index b8274bd..150d6be 100644
--- a/messages.mc
+++ b/messages.mc
@@ -137,6 +137,18 @@ Language = Italian
 Il path completo verso %s è troppo lungo!
 .
 
+MessageId = +1
+SymbolicName = NSSM_MESSAGE_FLAGS_TOO_LONG
+Severity = Informational
+Language = English
+The program flags are too long!
+.
+Language = French
+The program flags are too long!
+.
+Language = Italian
+The program flags are too long!
+.
 
 MessageId = +1
 SymbolicName = NSSM_MESSAGE_OUT_OF_MEMORY_FOR_IMAGEPATH
diff --git a/nssm.cpp b/nssm.cpp
index a60c378..86a1827 100644
--- a/nssm.cpp
+++ b/nssm.cpp
@@ -4,23 +4,22 @@ extern unsigned long tls_index;
 extern bool is_admin;
 extern imports_t imports;
 
-/* String function */
-int str_equiv(const char *a, const char *b) {
-  int i;
-  for (i = 0; ; i++) {
-    if (tolower(b[i]) != tolower(a[i])) return 0;
-    if (! a[i]) return 1;
-  }
+/* Are two strings case-insensitively equivalent? */
+int str_equiv(const TCHAR *a, const TCHAR *b) {
+  size_t len = _tcslen(a);
+  if (_tcslen(b) != len) return 0;
+  if (_tcsnicmp(a, b, len)) return 0;
+  return 1;
 }
 
 /* Remove basename of a path. */
-void strip_basename(char *buffer) {
-  size_t len = strlen(buffer);
+void strip_basename(TCHAR *buffer) {
+  size_t len = _tcslen(buffer);
   size_t i;
-  for (i = len; i && buffer[i] != '\\' && buffer[i] != '/'; i--);
+  for (i = len; i && buffer[i] != _T('\\') && buffer[i] != _T('/'); i--);
   /* X:\ is OK. */
-  if (i && buffer[i-1] == ':') i++;
-  buffer[i] = '\0';
+  if (i && buffer[i - 1] == _T(':')) i++;
+  buffer[i] = _T('\0');
 }
 
 /* How to use me correctly */
@@ -40,21 +39,21 @@ void check_admin() {
   FreeSid(AdministratorsGroup);
 }
 
-int main(int argc, char **argv) {
+int _tmain(int argc, TCHAR **argv) {
   /* Remember if we are admin */
   check_admin();
 
   /* Elevate */
   if (argc > 1) {
     /* Valid commands are install or remove */
-    if (str_equiv(argv[1], "install")) {
+    if (str_equiv(argv[1], _T("install"))) {
       if (! is_admin) {
         print_message(stderr, NSSM_MESSAGE_NOT_ADMINISTRATOR_CANNOT_INSTALL);
         exit(100);
       }
       exit(pre_install_service(argc - 2, argv + 2));
     }
-    if (str_equiv(argv[1], "remove")) {
+    if (str_equiv(argv[1], _T("remove"))) {
       if (! is_admin) {
         print_message(stderr, NSSM_MESSAGE_NOT_ADMINISTRATOR_CANNOT_REMOVE);
         exit(100);
diff --git a/nssm.h b/nssm.h
index 349e9b9..9d5d1d4 100644
--- a/nssm.h
+++ b/nssm.h
@@ -5,6 +5,7 @@
 #include <shlwapi.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <tchar.h>
 #include <windows.h>
 #include "service.h"
 #include "event.h"
@@ -15,13 +16,13 @@
 #include "io.h"
 #include "gui.h"
 
-int str_equiv(const char *, const char *);
-void strip_basename(char *);
+int str_equiv(const TCHAR *, const TCHAR *);
+void strip_basename(TCHAR *);
 
-#define NSSM "nssm"
-#define NSSM_VERSION "2.21"
+#define NSSM _T("nssm")
+#define NSSM_VERSION _T("2.21")
 #define NSSM_VERSIONINFO 2,21,0,0
-#define NSSM_DATE "2013-11-24"
+#define NSSM_DATE _T("2013-11-24")
 
 /*
   Throttle the restart of the service if it stops before this many
diff --git a/process.cpp b/process.cpp
index 34b07d3..1cc6a73 100644
--- a/process.cpp
+++ b/process.cpp
@@ -40,8 +40,8 @@ int check_parent(nssm_service_t *service, PROCESSENTRY32 *pe, unsigned long ppid
   */
   HANDLE process_handle = OpenProcess(PROCESS_QUERY_INFORMATION, false, pe->th32ProcessID);
   if (! process_handle) {
-    char pid_string[16];
-    _snprintf_s(pid_string, sizeof(pid_string), _TRUNCATE, "%lu", pe->th32ProcessID);
+    TCHAR pid_string[16];
+    _sntprintf_s(pid_string, _countof(pid_string), _TRUNCATE, _T("%lu"), pe->th32ProcessID);
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OPENPROCESS_FAILED, pid_string, service->name, error_string(GetLastError()), 0);
     return 2;
   }
@@ -90,7 +90,7 @@ int CALLBACK kill_window(HWND window, LPARAM arg) {
   processes so this function returns only true if at least one thread was
   successfully prodded.
 */
-int kill_threads(char *service_name, kill_t *k) {
+int kill_threads(TCHAR *service_name, kill_t *k) {
   int ret = 0;
 
   /* Get a snapshot of all threads in the system. */
@@ -162,7 +162,7 @@ int kill_process(nssm_service_t *service, HANDLE process_handle, unsigned long p
   if (service->stop_method & NSSM_STOP_METHOD_WINDOW) {
     EnumWindows((WNDENUMPROC) kill_window, (LPARAM) &k);
     if (k.signalled) {
-      if (! await_shutdown(service, __FUNCTION__, service->kill_window_delay)) return 1;
+      if (! await_shutdown(service, _T(__FUNCTION__), service->kill_window_delay)) return 1;
     }
   }
 
@@ -173,7 +173,7 @@ int kill_process(nssm_service_t *service, HANDLE process_handle, unsigned long p
   */
   if (service->stop_method & NSSM_STOP_METHOD_THREADS) {
     if (kill_threads(service->name, &k)) {
-      if (! await_shutdown(service, __FUNCTION__, service->kill_threads_delay)) return 1;
+      if (! await_shutdown(service, _T(__FUNCTION__), service->kill_threads_delay)) return 1;
     }
   }
 
@@ -236,7 +236,7 @@ int kill_console(nssm_service_t *service) {
   }
 
   /* Wait for process to exit. */
-  if (await_shutdown(service, __FUNCTION__, service->kill_console_delay)) ret = 6;
+  if (await_shutdown(service, _T(__FUNCTION__), service->kill_console_delay)) ret = 6;
 
   return ret;
 }
@@ -245,9 +245,9 @@ void kill_process_tree(nssm_service_t *service, unsigned long pid, unsigned long
   /* Shouldn't happen unless the service failed to start. */
   if (! pid) return;
 
-  char pid_string[16], code[16];
-  _snprintf_s(pid_string, sizeof(pid_string), _TRUNCATE, "%lu", pid);
-  _snprintf_s(code, sizeof(code), _TRUNCATE, "%lu", exitcode);
+  TCHAR pid_string[16], code[16];
+  _sntprintf_s(pid_string, _countof(pid_string), _TRUNCATE, _T("%lu"), pid);
+  _sntprintf_s(code, _countof(code), _TRUNCATE, _T("%lu"), exitcode);
   log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_KILLING, service->name, pid_string, code, 0);
 
   /* Get a snapshot of all processes in the system. */
@@ -292,8 +292,8 @@ void kill_process_tree(nssm_service_t *service, unsigned long pid, unsigned long
     return;
   }
 
-  char ppid_string[16];
-  _snprintf_s(ppid_string, sizeof(ppid_string), _TRUNCATE, "%lu", ppid);
+  TCHAR ppid_string[16];
+  _sntprintf_s(ppid_string, _countof(ppid_string), _TRUNCATE, _T("%lu"), ppid);
   log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_KILL_PROCESS_TREE, pid_string, ppid_string, service->name, 0);
   if (! kill_process(service, process_handle, pid, exitcode)) {
     /* Maybe it already died. */
diff --git a/process.h b/process.h
index 165bb22..3489f54 100644
--- a/process.h
+++ b/process.h
@@ -11,7 +11,7 @@ typedef struct {
 
 int get_process_creation_time(HANDLE, FILETIME *);
 int get_process_exit_time(HANDLE, FILETIME *);
-int check_parent(char *, PROCESSENTRY32 *, unsigned long, FILETIME *, FILETIME *);
+int check_parent(TCHAR *, PROCESSENTRY32 *, unsigned long, FILETIME *, FILETIME *);
 int CALLBACK kill_window(HWND, LPARAM);
 int kill_threads(nssm_service_t *, kill_t *);
 int kill_console(nssm_service_t *);
diff --git a/registry.cpp b/registry.cpp
index c63821d..59b8c48 100644
--- a/registry.cpp
+++ b/registry.cpp
@@ -1,13 +1,13 @@
 #include "nssm.h"
 
-extern const char *exit_action_strings[];
+extern const TCHAR *exit_action_strings[];
 
 int create_messages() {
   HKEY key;
 
-  char registry[KEY_LENGTH];
-  if (_snprintf_s(registry, sizeof(registry), _TRUNCATE, "SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\%s", NSSM) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "eventlog registry", "create_messages()", 0);
+  TCHAR registry[KEY_LENGTH];
+  if (_sntprintf_s(registry, _countof(registry), _TRUNCATE, _T("SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\%s"), NSSM) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("eventlog registry"), _T("create_messages()"), 0);
     return 1;
   }
 
@@ -17,22 +17,22 @@ int create_messages() {
   }
 
   /* Get path of this program */
-  char path[MAX_PATH];
-  GetModuleFileName(0, path, MAX_PATH);
+  TCHAR path[MAX_PATH];
+  GetModuleFileName(0, path, _countof(path));
 
   /* Try to register the module but don't worry so much on failure */
-  RegSetValueEx(key, "EventMessageFile", 0, REG_SZ, (const unsigned char *) path, (unsigned long) strlen(path) + 1);
+  RegSetValueEx(key, _T("EventMessageFile"), 0, REG_SZ, (const unsigned char *) path, (unsigned long) (_tcslen(path) +  1) * sizeof(TCHAR));
   unsigned long types = EVENTLOG_INFORMATION_TYPE | EVENTLOG_WARNING_TYPE | EVENTLOG_ERROR_TYPE;
-  RegSetValueEx(key, "TypesSupported", 0, REG_DWORD, (const unsigned char *) &types, sizeof(types));
+  RegSetValueEx(key, _T("TypesSupported"), 0, REG_DWORD, (const unsigned char *) &types, sizeof(types));
 
   return 0;
 }
 
 int create_parameters(nssm_service_t *service) {
   /* Get registry */
-  char registry[KEY_LENGTH];
-  if (_snprintf_s(registry, sizeof(registry), _TRUNCATE, NSSM_REGISTRY, service->name) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "NSSM_REGISTRY", "create_parameters()", 0);
+  TCHAR registry[KEY_LENGTH];
+  if (_sntprintf_s(registry, _countof(registry), _TRUNCATE, NSSM_REGISTRY, service->name) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("NSSM_REGISTRY"), _T("create_parameters()"), 0);
     return 1;
   }
 
@@ -89,12 +89,12 @@ int create_parameters(nssm_service_t *service) {
 
   /* Environment */
   if (service->env) {
-    if (RegSetValueEx(key, NSSM_REG_ENV, 0, REG_MULTI_SZ, (const unsigned char *) service->env, (unsigned long) service->envlen) != ERROR_SUCCESS) {
+    if (RegSetValueEx(key, NSSM_REG_ENV, 0, REG_MULTI_SZ, (const unsigned char *) service->env, (unsigned long) service->envlen * sizeof(TCHAR)) != ERROR_SUCCESS) {
       log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, NSSM_REG_ENV, error_string(GetLastError()), 0);
     }
   }
   if (service->env_extra) {
-    if (RegSetValueEx(key, NSSM_REG_ENV_EXTRA, 0, REG_MULTI_SZ, (const unsigned char *) service->env_extra, (unsigned long) service->env_extralen) != ERROR_SUCCESS) {
+    if (RegSetValueEx(key, NSSM_REG_ENV_EXTRA, 0, REG_MULTI_SZ, (const unsigned char *) service->env_extra, (unsigned long) service->env_extralen * sizeof(TCHAR)) != ERROR_SUCCESS) {
       log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, NSSM_REG_ENV_EXTRA, error_string(GetLastError()), 0);
     }
   }
@@ -105,11 +105,11 @@ int create_parameters(nssm_service_t *service) {
   return 0;
 }
 
-int create_exit_action(char *service_name, const char *action_string) {
+int create_exit_action(TCHAR *service_name, const TCHAR *action_string) {
   /* Get registry */
-  char registry[KEY_LENGTH];
-  if (_snprintf_s(registry, sizeof(registry), _TRUNCATE, NSSM_REGISTRY "\\%s", service_name, NSSM_REG_EXIT) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "NSSM_REG_EXIT", "create_exit_action()", 0);
+  TCHAR registry[KEY_LENGTH];
+  if (_sntprintf_s(registry, _countof(registry), _TRUNCATE, NSSM_REGISTRY _T("\\%s"), service_name, NSSM_REG_EXIT) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("NSSM_REG_EXIT"), _T("create_exit_action()"), 0);
     return 1;
   }
 
@@ -128,7 +128,7 @@ int create_exit_action(char *service_name, const char *action_string) {
   }
 
   /* Create the default value */
-  if (RegSetValueEx(key, 0, 0, REG_SZ, (const unsigned char *) action_string, (unsigned long) strlen(action_string) + 1) != ERROR_SUCCESS) {
+  if (RegSetValueEx(key, 0, 0, REG_SZ, (const unsigned char *) action_string, (unsigned long) (_tcslen(action_string) + 1) * sizeof(TCHAR)) != ERROR_SUCCESS) {
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, NSSM_REG_EXIT, error_string(GetLastError()), 0);
     RegCloseKey(key);
     return 3;
@@ -140,7 +140,7 @@ int create_exit_action(char *service_name, const char *action_string) {
   return 0;
 }
 
-int set_environment(char *service_name, HKEY key, char *value, char **env, unsigned long *envlen) {
+int set_environment(TCHAR *service_name, HKEY key, TCHAR *value, TCHAR **env, unsigned long *envlen) {
   unsigned long type = REG_MULTI_SZ;
 
   /* Dummy test to find buffer size */
@@ -164,9 +164,9 @@ int set_environment(char *service_name, HKEY key, char *value, char **env, unsig
   /* Previously initialised? */
   if (*env) HeapFree(GetProcessHeap(), 0, *env);
 
-  *env = (char *) HeapAlloc(GetProcessHeap(), 0, *envlen);
+  *env = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, *envlen);
   if (! *env) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, value, "set_environment()", 0);
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, value, _T("set_environment()"), 0);
     return 3;
   }
 
@@ -183,10 +183,10 @@ int set_environment(char *service_name, HKEY key, char *value, char **env, unsig
   return 0;
 }
 
-int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, bool sanitise, bool must_exist) {
-  unsigned char *buffer = (unsigned char *) HeapAlloc(GetProcessHeap(), 0, datalen);
+int expand_parameter(HKEY key, TCHAR *value, TCHAR *data, unsigned long datalen, bool sanitise, bool must_exist) {
+  TCHAR *buffer = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, datalen);
   if (! buffer) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, value, "expand_parameter()", 0);
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, value, _T("expand_parameter()"), 0);
     return 1;
   }
 
@@ -195,7 +195,7 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
   unsigned long type = REG_EXPAND_SZ;
   unsigned long buflen = datalen;
 
-  unsigned long ret = RegQueryValueEx(key, value, 0, &type, buffer, &buflen);
+  unsigned long ret = RegQueryValueEx(key, value, 0, &type, (unsigned char *) buffer, &buflen);
   if (ret != ERROR_SUCCESS) {
     unsigned long error = GetLastError();
     HeapFree(GetProcessHeap(), 0, buffer);
@@ -209,7 +209,7 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
   }
 
   /* Paths aren't allowed to contain quotes. */
-  if (sanitise) PathUnquoteSpaces((LPSTR) buffer);
+  if (sanitise) PathUnquoteSpaces(buffer);
 
   /* Technically we shouldn't expand environment strings from REG_SZ values */
   if (type != REG_EXPAND_SZ) {
@@ -218,7 +218,7 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
     return 0;
   }
 
-  ret = ExpandEnvironmentStrings((char *) buffer, data, datalen);
+  ret = ExpandEnvironmentStrings((TCHAR *) buffer, data, datalen);
   if (! ret || ret > datalen) {
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_EXPANDENVIRONMENTSTRINGS_FAILED, buffer, error_string(GetLastError()), 0);
     HeapFree(GetProcessHeap(), 0, buffer);
@@ -229,7 +229,7 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
   return 0;
 }
 
-int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, bool sanitise) {
+int expand_parameter(HKEY key, TCHAR *value, TCHAR *data, unsigned long datalen, bool sanitise) {
   return expand_parameter(key, value, data, datalen, sanitise, true);
 }
 
@@ -238,8 +238,8 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
   Returns: 0 if it was set.
            1 on error.
 */
-int set_expand_string(HKEY key, char *value, char *string) {
-  if (RegSetValueEx(key, value, 0, REG_EXPAND_SZ, (const unsigned char *) string, (unsigned long) strlen(string) + 1) == ERROR_SUCCESS) return 0;
+int set_expand_string(HKEY key, TCHAR *value, TCHAR *string) {
+  if (RegSetValueEx(key, value, 0, REG_EXPAND_SZ, (const unsigned char *) string, (unsigned long) (_tcslen(string) + 1) * sizeof(TCHAR)) == ERROR_SUCCESS) return 0;
   log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, value, error_string(GetLastError()), 0);
   return 1;
 }
@@ -249,7 +249,7 @@ int set_expand_string(HKEY key, char *value, char *string) {
   Returns: 0 if it was set.
            1 on error.
 */
-int set_number(HKEY key, char *value, unsigned long number) {
+int set_number(HKEY key, TCHAR *value, unsigned long number) {
   if (RegSetValueEx(key, value, 0, REG_DWORD, (const unsigned char *) &number, sizeof(number)) == ERROR_SUCCESS) return 0;
   log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, value, error_string(GetLastError()), 0);
   return 1;
@@ -262,7 +262,7 @@ int set_number(HKEY key, char *value, unsigned long number) {
            -1 if none was found and must_exist is true.
            -2 otherwise.
 */
-int get_number(HKEY key, char *value, unsigned long *number, bool must_exist) {
+int get_number(HKEY key, TCHAR *value, unsigned long *number, bool must_exist) {
   unsigned long type = REG_DWORD;
   unsigned long number_len = sizeof(unsigned long);
 
@@ -279,11 +279,11 @@ int get_number(HKEY key, char *value, unsigned long *number, bool must_exist) {
   return -2;
 }
 
-int get_number(HKEY key, char *value, unsigned long *number) {
+int get_number(HKEY key, TCHAR *value, unsigned long *number) {
   return get_number(key, value, number, true);
 }
 
-void override_milliseconds(char *service_name, HKEY key, char *value, unsigned long *buffer, unsigned long default_value, unsigned long event) {
+void override_milliseconds(TCHAR *service_name, HKEY key, TCHAR *value, unsigned long *buffer, unsigned long default_value, unsigned long event) {
   unsigned long type = REG_DWORD;
   unsigned long buflen = sizeof(unsigned long);
   bool ok = false;
@@ -291,8 +291,8 @@ void override_milliseconds(char *service_name, HKEY key, char *value, unsigned l
   if (ret != ERROR_SUCCESS) {
     if (ret != ERROR_FILE_NOT_FOUND) {
       if (type != REG_DWORD) {
-        char milliseconds[16];
-        _snprintf_s(milliseconds, sizeof(milliseconds), _TRUNCATE, "%lu", default_value);
+        TCHAR milliseconds[16];
+        _sntprintf_s(milliseconds, _countof(milliseconds), _TRUNCATE, _T("%lu"), default_value);
         log_event(EVENTLOG_WARNING_TYPE, event, service_name, value, milliseconds, 0);
       }
       else log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_QUERYVALUE_FAILED, value, error_string(GetLastError()), 0);
@@ -307,9 +307,9 @@ int get_parameters(nssm_service_t *service, STARTUPINFO *si) {
   unsigned long ret;
 
   /* Get registry */
-  char registry[KEY_LENGTH];
-  if (_snprintf_s(registry, sizeof(registry), _TRUNCATE, NSSM_REGISTRY, service->name) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "NSSM_REGISTRY", "get_parameters()", 0);
+  TCHAR registry[KEY_LENGTH];
+  if (_sntprintf_s(registry, _countof(registry), _TRUNCATE, NSSM_REGISTRY, service->name) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("NSSM_REGISTRY"), _T("get_parameters()"), 0);
     return 1;
   }
 
@@ -334,14 +334,9 @@ int get_parameters(nssm_service_t *service, STARTUPINFO *si) {
 
   /* Try to get startup directory - may fail and we fall back to a default */
   if (expand_parameter(key, NSSM_REG_DIR, service->dir, sizeof(service->dir), true) || ! service->dir[0]) {
-    /* Our buffers are defined to be long enough for this to be safe */
-    size_t i;
-    for (i = strlen(service->exe); i && service->exe[i] != '\\' && service->exe[i] != '/'; i--);
-    if (i) {
-      memmove(service->dir, service->exe, i);
-      service->dir[i] = '\0';
-    }
-    else {
+    _sntprintf_s(service->dir, _countof(service->dir), _TRUNCATE, _T("%s"), service->exe);
+    strip_basename(service->dir);
+    if (service->dir[0] == _T('\0')) {
       /* Help! */
       ret = GetWindowsDirectory(service->dir, sizeof(service->dir));
       if (! ret || ret > sizeof(service->dir)) {
@@ -363,28 +358,29 @@ int get_parameters(nssm_service_t *service, STARTUPINFO *si) {
     if (service->env) {
       /* Append extra variables to configured variables. */
       unsigned long envlen = service->envlen + service->env_extralen - 1;
-      char *env = (char *) HeapAlloc(GetProcessHeap(), 0, envlen);
+      TCHAR *env = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, envlen);
       if (env) {
-        memmove(env, service->env, service->envlen - 1);
-        memmove(env + service->envlen - 1, service->env_extra, service->env_extralen);
+        memmove(env, service->env, service->envlen - sizeof(TCHAR));
+        /* envlen is in bytes. */
+        memmove(env + (service->envlen / sizeof(TCHAR)) - 1, service->env_extra, service->env_extralen);
 
         HeapFree(GetProcessHeap(), 0, service->env);
         service->env = env;
         service->envlen = envlen;
       }
-      else log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "environment", "get_parameters()", 0);
+      else log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("environment"), _T("get_parameters()"), 0);
     }
     else {
       /* Append extra variables to our environment. */
-      char *env, *s;
+      TCHAR *env, *s;
       size_t envlen, len;
 
       env = service->env_extra;
       len = 0;
       while (*env) {
-        envlen = strlen(env) + 1;
-        for (s = env; *s && *s != '='; s++);
-        if (*s == '=') *s++ = '\0';
+        envlen = _tcslen(env) + 1;
+        for (s = env; *s && *s != _T('='); s++);
+        if (*s == _T('=')) *s++ = _T('\0');
         if (! SetEnvironmentVariable(env, s)) log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_SETENVIRONMENTVARIABLE_FAILED, env, s, error_string(GetLastError()));
         env += envlen;
       }
@@ -432,14 +428,14 @@ int get_parameters(nssm_service_t *service, STARTUPINFO *si) {
   return 0;
 }
 
-int get_exit_action(char *service_name, unsigned long *ret, unsigned char *action, bool *default_action) {
+int get_exit_action(TCHAR *service_name, unsigned long *ret, TCHAR *action, bool *default_action) {
   /* Are we returning the default action or a status-specific one? */
   *default_action = ! ret;
 
   /* Get registry */
-  char registry[KEY_LENGTH];
-  if (_snprintf_s(registry, sizeof(registry), _TRUNCATE, NSSM_REGISTRY "\\%s", service_name, NSSM_REG_EXIT) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "NSSM_REG_EXIT", "get_exit_action()", 0);
+  TCHAR registry[KEY_LENGTH];
+  if (_sntprintf_s(registry, _countof(registry), _TRUNCATE, NSSM_REGISTRY _T("\\%s"), service_name, NSSM_REG_EXIT) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("NSSM_REG_EXIT"), _T("get_exit_action()"), 0);
     return 1;
   }
 
@@ -454,13 +450,13 @@ int get_exit_action(char *service_name, unsigned long *ret, unsigned char *actio
   unsigned long type = REG_SZ;
   unsigned long action_len = ACTION_LEN;
 
-  char code[64];
-  if (! ret) code[0] = '\0';
-  else if (_snprintf_s(code, sizeof(code), _TRUNCATE, "%lu", *ret) < 0) {
+  TCHAR code[16];
+  if (! ret) code[0] = _T('\0');
+  else if (_sntprintf_s(code, _countof(code), _TRUNCATE, _T("%lu"), *ret) < 0) {
     RegCloseKey(key);
     return get_exit_action(service_name, 0, action, default_action);
   }
-  if (RegQueryValueEx(key, code, 0, &type, action, &action_len) != ERROR_SUCCESS) {
+  if (RegQueryValueEx(key, code, 0, &type, (unsigned char *) action, &action_len) != ERROR_SUCCESS) {
     RegCloseKey(key);
     /* Try again with * as the key if an exit code was defined */
     if (ret) return get_exit_action(service_name, 0, action, default_action);
diff --git a/registry.h b/registry.h
index 3c64b5d..ffdf3d6 100644
--- a/registry.h
+++ b/registry.h
@@ -1,38 +1,38 @@
 #ifndef REGISTRY_H
 #define REGISTRY_H
 
-#define NSSM_REGISTRY "SYSTEM\\CurrentControlSet\\Services\\%s\\Parameters"
-#define NSSM_REG_EXE "Application"
-#define NSSM_REG_FLAGS "AppParameters"
-#define NSSM_REG_DIR "AppDirectory"
-#define NSSM_REG_ENV "AppEnvironment"
-#define NSSM_REG_ENV_EXTRA "AppEnvironmentExtra"
-#define NSSM_REG_EXIT "AppExit"
-#define NSSM_REG_THROTTLE "AppThrottle"
-#define NSSM_REG_STOP_METHOD_SKIP "AppStopMethodSkip"
-#define NSSM_REG_KILL_CONSOLE_GRACE_PERIOD "AppStopMethodConsole"
-#define NSSM_REG_KILL_WINDOW_GRACE_PERIOD "AppStopMethodWindow"
-#define NSSM_REG_KILL_THREADS_GRACE_PERIOD "AppStopMethodThreads"
-#define NSSM_REG_STDIN "AppStdin"
-#define NSSM_REG_STDOUT "AppStdout"
-#define NSSM_REG_STDERR "AppStderr"
-#define NSSM_REG_STDIO_SHARING "ShareMode"
-#define NSSM_REG_STDIO_DISPOSITION "CreationDisposition"
-#define NSSM_REG_STDIO_FLAGS "FlagsAndAttributes"
+#define NSSM_REGISTRY _T("SYSTEM\\CurrentControlSet\\Services\\%s\\Parameters")
+#define NSSM_REG_EXE _T("Application")
+#define NSSM_REG_FLAGS _T("AppParameters")
+#define NSSM_REG_DIR _T("AppDirectory")
+#define NSSM_REG_ENV _T("AppEnvironment")
+#define NSSM_REG_ENV_EXTRA _T("AppEnvironmentExtra")
+#define NSSM_REG_EXIT _T("AppExit")
+#define NSSM_REG_THROTTLE _T("AppThrottle")
+#define NSSM_REG_STOP_METHOD_SKIP _T("AppStopMethodSkip")
+#define NSSM_REG_KILL_CONSOLE_GRACE_PERIOD _T("AppStopMethodConsole")
+#define NSSM_REG_KILL_WINDOW_GRACE_PERIOD _T("AppStopMethodWindow")
+#define NSSM_REG_KILL_THREADS_GRACE_PERIOD _T("AppStopMethodThreads")
+#define NSSM_REG_STDIN _T("AppStdin")
+#define NSSM_REG_STDOUT _T("AppStdout")
+#define NSSM_REG_STDERR _T("AppStderr")
+#define NSSM_REG_STDIO_SHARING _T("ShareMode")
+#define NSSM_REG_STDIO_DISPOSITION _T("CreationDisposition")
+#define NSSM_REG_STDIO_FLAGS _T("FlagsAndAttributes")
 #define NSSM_STDIO_LENGTH 29
 
 int create_messages();
 int create_parameters(nssm_service_t *);
-int create_exit_action(char *, const char *);
-int set_environment(char *, HKEY, char *, char **, unsigned long *);
-int expand_parameter(HKEY, char *, char *, unsigned long, bool, bool);
-int expand_parameter(HKEY, char *, char *, unsigned long, bool);
-int set_expand_string(HKEY, char *, char *);
-int set_number(HKEY, char *, unsigned long);
-int get_number(HKEY, char *, unsigned long *, bool);
-int get_number(HKEY, char *, unsigned long *);
-void override_milliseconds(char *, HKEY, char *, unsigned long *, unsigned long, unsigned long);
+int create_exit_action(TCHAR *, const TCHAR *);
+int set_environment(TCHAR *, HKEY, TCHAR *, TCHAR **, unsigned long *);
+int expand_parameter(HKEY, TCHAR *, TCHAR *, unsigned long, bool, bool);
+int expand_parameter(HKEY, TCHAR *, TCHAR *, unsigned long, bool);
+int set_expand_string(HKEY, TCHAR *, TCHAR *);
+int set_number(HKEY, TCHAR *, unsigned long);
+int get_number(HKEY, TCHAR *, unsigned long *, bool);
+int get_number(HKEY, TCHAR *, unsigned long *);
+void override_milliseconds(TCHAR *, HKEY, TCHAR *, unsigned long *, unsigned long, unsigned long);
 int get_parameters(nssm_service_t *, STARTUPINFO *);
-int get_exit_action(char *, unsigned long *, unsigned char *, bool *);
+int get_exit_action(TCHAR *, unsigned long *, TCHAR *, bool *);
 
 #endif
diff --git a/service.cpp b/service.cpp
index 0a95ccf..fc9b73c 100644
--- a/service.cpp
+++ b/service.cpp
@@ -5,7 +5,7 @@ bool use_critical_section;
 
 extern imports_t imports;
 
-const char *exit_action_strings[] = { "Restart", "Ignore", "Exit", "Suicide", 0 };
+const TCHAR *exit_action_strings[] = { _T("Restart"), _T("Ignore"), _T("Exit"), _T("Suicide"), 0 };
 
 static inline int throttle_milliseconds(unsigned long throttle) {
   /* pow() operates on doubles. */
@@ -55,7 +55,7 @@ void set_nssm_service_defaults(nssm_service_t *service) {
 /* Allocate and zero memory for a service. */
 nssm_service_t *alloc_nssm_service() {
   nssm_service_t *service = (nssm_service_t *) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(nssm_service_t));
-  if (! service) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "service", "alloc_nssm_service()", 0);
+  if (! service) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("service"), _T("alloc_nssm_service()"), 0);
   return service;
 }
 
@@ -73,42 +73,40 @@ void cleanup_nssm_service(nssm_service_t *service) {
 }
 
 /* About to install the service */
-int pre_install_service(int argc, char **argv) {
+int pre_install_service(int argc, TCHAR **argv) {
   /* Show the dialogue box if we didn't give the service name and path */
   if (argc < 2) return nssm_gui(IDD_INSTALL, argv[0]);
 
   nssm_service_t *service = alloc_nssm_service();
   if (! service) {
-    print_message(stderr, NSSM_EVENT_OUT_OF_MEMORY, "service", "pre_install_service()");
+    print_message(stderr, NSSM_EVENT_OUT_OF_MEMORY, _T("service"), _T("pre_install_service()"));
     return 1;
   }
 
   set_nssm_service_defaults(service);
-  memmove(service->name, argv[0], strlen(argv[0]));
-  memmove(service->exe, argv[1], strlen(argv[1]));
+  _sntprintf_s(service->name, _countof(service->name), _TRUNCATE, _T("%s"), argv[0]);
+  _sntprintf_s(service->exe, _countof(service->exe), _TRUNCATE, _T("%s"), argv[1]);
 
   /* Arguments are optional */
   size_t flagslen = 0;
   size_t s = 0;
   int i;
-  for (i = 2; i < argc; i++) flagslen += strlen(argv[i]) + 1;
+  for (i = 2; i < argc; i++) flagslen += _tcslen(argv[i]) + 1;
   if (! flagslen) flagslen = 1;
+  if (flagslen > _countof(service->flags)) {
+    print_message(stderr, NSSM_MESSAGE_FLAGS_TOO_LONG);
+    return 2;
+  }
 
-  /*
-    This probably isn't UTF8-safe and should use std::string or something
-    but it's been broken for the best part of a decade and due for a rewrite
-    anyway so it'll do as a quick-'n'-dirty fix.  Note that we don't free
-    the flags buffer but as the program exits that isn't a big problem.
-  */
   for (i = 2; i < argc; i++) {
-    size_t len = strlen(argv[i]);
-    memmove(service->flags + s, argv[i], len);
+    size_t len = _tcslen(argv[i]);
+    memmove(service->flags + s, argv[i], len * sizeof(TCHAR));
     s += len;
-    if (i < argc - 1) service->flags[s++] = ' ';
+    if (i < argc - 1) service->flags[s++] = _T(' ');
   }
 
   /* Work out directory name */
-  memmove(service->dir, service->exe, sizeof(service->dir));
+  _sntprintf_s(service->dir, _countof(service->dir), _TRUNCATE, _T("%s"), service->exe);
   strip_basename(service->dir);
 
   int ret = install_service(service);
@@ -117,12 +115,12 @@ int pre_install_service(int argc, char **argv) {
 }
 
 /* About to remove the service */
-int pre_remove_service(int argc, char **argv) {
+int pre_remove_service(int argc, TCHAR **argv) {
   /* Show dialogue box if we didn't pass service name and "confirm" */
   if (argc < 2) return nssm_gui(IDD_REMOVE, argv[0]);
-  if (str_equiv(argv[1], "confirm")) {
+  if (str_equiv(argv[1], _T("confirm"))) {
     nssm_service_t *service = alloc_nssm_service();
-    memmove(service->name, argv[0], strlen(argv[0]));
+    _sntprintf_s(service->name, _countof(service->name), _TRUNCATE, _T("%s"), argv[0]);
     int ret = remove_service(service);
     cleanup_nssm_service(service);
     return ret;
@@ -144,17 +142,17 @@ int install_service(nssm_service_t *service) {
   }
 
   /* Get path of this program */
-  char path[MAX_PATH];
+  TCHAR path[MAX_PATH];
   GetModuleFileName(0, path, MAX_PATH);
 
   /* Construct command */
-  char command[CMD_LENGTH];
-  size_t pathlen = strlen(path);
+  TCHAR command[CMD_LENGTH];
+  size_t pathlen = _tcslen(path);
   if (pathlen + 1 >= VALUE_LENGTH) {
     print_message(stderr, NSSM_MESSAGE_PATH_TOO_LONG, NSSM);
     return 3;
   }
-  if (_snprintf_s(command, sizeof(command), _TRUNCATE, "\"%s\"", path) < 0) {
+  if (_sntprintf_s(command, sizeof(command), _TRUNCATE, _T("\"%s\""), path) < 0) {
     print_message(stderr, NSSM_MESSAGE_OUT_OF_MEMORY_FOR_IMAGEPATH);
     return 4;
   }
@@ -219,12 +217,12 @@ int remove_service(nssm_service_t *service) {
 }
 
 /* Service initialisation */
-void WINAPI service_main(unsigned long argc, char **argv) {
+void WINAPI service_main(unsigned long argc, TCHAR **argv) {
   nssm_service_t *service = alloc_nssm_service();
   if (! service) return;
 
-  if (_snprintf_s(service->name, sizeof(service->name), _TRUNCATE, "%s", argv[0]) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "service->name", "service_main()", 0);
+  if (_sntprintf_s(service->name, _countof(service->name), _TRUNCATE, _T("%s"), argv[0]) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("service->name"), _T("service_main()"), 0);
     return;
   }
 
@@ -305,8 +303,8 @@ int monitor_service(nssm_service_t *service) {
   /* Set service status to started */
   int ret = start_service(service);
   if (ret) {
-    char code[16];
-    _snprintf_s(code, sizeof(code), _TRUNCATE, "%d", ret);
+    TCHAR code[16];
+    _sntprintf_s(code, _countof(code), _TRUNCATE, _T("%d"), ret);
     log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_START_SERVICE_FAILED, service->exe, service->name, ret, 0);
     return ret;
   }
@@ -320,32 +318,32 @@ int monitor_service(nssm_service_t *service) {
   return 0;
 }
 
-char *service_control_text(unsigned long control) {
+TCHAR *service_control_text(unsigned long control) {
   switch (control) {
     /* HACK: there is no SERVICE_CONTROL_START constant */
-    case 0: return "START";
-    case SERVICE_CONTROL_STOP: return "STOP";
-    case SERVICE_CONTROL_SHUTDOWN: return "SHUTDOWN";
-    case SERVICE_CONTROL_PAUSE: return "PAUSE";
-    case SERVICE_CONTROL_CONTINUE: return "CONTINUE";
-    case SERVICE_CONTROL_INTERROGATE: return "INTERROGATE";
+    case 0: return _T("START");
+    case SERVICE_CONTROL_STOP: return _T("STOP");
+    case SERVICE_CONTROL_SHUTDOWN: return _T("SHUTDOWN");
+    case SERVICE_CONTROL_PAUSE: return _T("PAUSE");
+    case SERVICE_CONTROL_CONTINUE: return _T("CONTINUE");
+    case SERVICE_CONTROL_INTERROGATE: return _T("INTERROGATE");
     default: return 0;
   }
 }
 
-void log_service_control(char *service_name, unsigned long control, bool handled) {
-  char *text = service_control_text(control);
+void log_service_control(TCHAR *service_name, unsigned long control, bool handled) {
+  TCHAR *text = service_control_text(control);
   unsigned long event;
 
   if (! text) {
     /* "0x" + 8 x hex + NULL */
-    text = (char *) HeapAlloc(GetProcessHeap(), 0, 11);
+    text = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, 11 * sizeof(TCHAR));
     if (! text) {
-      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "control code", "log_service_control()", 0);
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("control code"), _T("log_service_control()"), 0);
       return;
     }
-    if (_snprintf_s(text, 11, _TRUNCATE, "0x%08x", control) < 0) {
-      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "control code", "log_service_control()", 0);
+    if (_sntprintf_s(text, 11, _TRUNCATE, _T("0x%08x"), control) < 0) {
+      log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("control code"), _T("log_service_control()"), 0);
       HeapFree(GetProcessHeap(), 0, text);
       return;
     }
@@ -447,9 +445,9 @@ int start_service(nssm_service_t *service) {
   }
 
   /* Launch executable with arguments */
-  char cmd[CMD_LENGTH];
-  if (_snprintf_s(cmd, sizeof(cmd), _TRUNCATE, "\"%s\" %s", service->exe, service->flags) < 0) {
-    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, "command line", "start_service", 0);
+  TCHAR cmd[CMD_LENGTH];
+  if (_sntprintf_s(cmd, _countof(cmd), _TRUNCATE, _T("\"%s\" %s"), service->exe, service->flags) < 0) {
+    log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_OUT_OF_MEMORY, _T("command line"), _T("start_service"), 0);
     close_output_handles(&si);
     return stop_service(service, 2, true, true);
   }
@@ -458,7 +456,11 @@ int start_service(nssm_service_t *service) {
 
   bool inherit_handles = false;
   if (si.dwFlags & STARTF_USESTDHANDLES) inherit_handles = true;
-  if (! CreateProcess(0, cmd, 0, 0, inherit_handles, 0, service->env, service->dir, &si, &pi)) {
+  unsigned long flags = 0;
+#ifdef UNICODE
+  flags |= CREATE_UNICODE_ENVIRONMENT;
+#endif
+  if (! CreateProcess(0, cmd, 0, 0, inherit_handles, flags, service->env, service->dir, &si, &pi)) {
     unsigned long error = GetLastError();
     if (error == ERROR_INVALID_PARAMETER && service->env) log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPROCESS_FAILED_INVALID_ENVIRONMENT, service->name, service->exe, NSSM_REG_ENV, 0);
     else log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_CREATEPROCESS_FAILED, service->name, service->exe, error_string(error), 0);
@@ -479,10 +481,10 @@ int start_service(nssm_service_t *service) {
   */
   unsigned long delay = service->throttle_delay;
   if (delay > NSSM_SERVICE_STATUS_DEADLINE) {
-    char delay_milliseconds[16];
-    _snprintf_s(delay_milliseconds, sizeof(delay_milliseconds), _TRUNCATE, "%lu", delay);
-    char deadline_milliseconds[16];
-    _snprintf_s(deadline_milliseconds, sizeof(deadline_milliseconds), _TRUNCATE, "%lu", NSSM_SERVICE_STATUS_DEADLINE);
+    TCHAR delay_milliseconds[16];
+    _sntprintf_s(delay_milliseconds, _countof(delay_milliseconds), _TRUNCATE, _T("%lu"), delay);
+    TCHAR deadline_milliseconds[16];
+    _sntprintf_s(deadline_milliseconds, _countof(deadline_milliseconds), _TRUNCATE, _T("%lu"), NSSM_SERVICE_STATUS_DEADLINE);
     log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_STARTUP_DELAY_TOO_LONG, service->name, delay_milliseconds, NSSM, deadline_milliseconds, 0);
     delay = NSSM_SERVICE_STATUS_DEADLINE;
   }
@@ -560,7 +562,7 @@ void CALLBACK end_service(void *arg, unsigned char why) {
 
   /* Check exit code */
   unsigned long exitcode = 0;
-  char code[16];
+  TCHAR code[16];
   GetExitCodeProcess(service->process_handle, &exitcode);
   if (exitcode == STILL_ACTIVE || get_process_exit_time(service->process_handle, &service->exit_time)) GetSystemTimeAsFileTime(&service->exit_time);
   CloseHandle(service->process_handle);
@@ -573,7 +575,7 @@ void CALLBACK end_service(void *arg, unsigned char why) {
     tree.  See below for the possible values of the why argument.
   */
   if (! why) {
-    _snprintf_s(code, sizeof(code), _TRUNCATE, "%lu", exitcode);
+    _sntprintf_s(code, _countof(code), _TRUNCATE, _T("%lu"), exitcode);
     log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_ENDED_SERVICE, service->exe, service->name, code, 0);
   }
 
@@ -592,11 +594,11 @@ void CALLBACK end_service(void *arg, unsigned char why) {
 
   /* What action should we take? */
   int action = NSSM_EXIT_RESTART;
-  unsigned char action_string[ACTION_LEN];
+  TCHAR action_string[ACTION_LEN];
   bool default_action;
   if (! get_exit_action(service->name, &exitcode, action_string, &default_action)) {
     for (int i = 0; exit_action_strings[i]; i++) {
-      if (! _strnicmp((const char *) action_string, exit_action_strings[i], ACTION_LEN)) {
+      if (! _tcsnicmp((const TCHAR *) action_string, exit_action_strings[i], ACTION_LEN)) {
         action = i;
         break;
       }
@@ -643,9 +645,9 @@ void throttle_restart(nssm_service_t *service) {
 
   if (service->throttle > 7) service->throttle = 8;
 
-  char threshold[8], milliseconds[8];
-  _snprintf_s(threshold, sizeof(threshold), _TRUNCATE, "%lu", service->throttle_delay);
-  _snprintf_s(milliseconds, sizeof(milliseconds), _TRUNCATE, "%lu", ms);
+  TCHAR threshold[8], milliseconds[8];
+  _sntprintf_s(threshold, _countof(threshold), _TRUNCATE, _T("%lu"), service->throttle_delay);
+  _sntprintf_s(milliseconds, _countof(milliseconds), _TRUNCATE, _T("%lu"), ms);
   log_event(EVENTLOG_WARNING_TYPE, NSSM_EVENT_THROTTLED, service->name, threshold, milliseconds, 0);
 
   if (use_critical_section) EnterCriticalSection(&service->throttle_section);
@@ -696,24 +698,24 @@ void throttle_restart(nssm_service_t *service) {
            0 if the wait completed.
           -1 on error.
 */
-int await_shutdown(nssm_service_t *service, char *function_name, unsigned long timeout) {
+int await_shutdown(nssm_service_t *service, TCHAR *function_name, unsigned long timeout) {
   unsigned long interval;
   unsigned long waithint;
   unsigned long ret;
   unsigned long waited;
-  char interval_milliseconds[16];
-  char timeout_milliseconds[16];
-  char waited_milliseconds[16];
-  char *function = function_name;
+  TCHAR interval_milliseconds[16];
+  TCHAR timeout_milliseconds[16];
+  TCHAR waited_milliseconds[16];
+  TCHAR *function = function_name;
 
   /* Add brackets to function name. */
-  size_t funclen = strlen(function_name) + 3;
-  char *func = (char *) HeapAlloc(GetProcessHeap(), 0, funclen);
+  size_t funclen = _tcslen(function_name) + 3;
+  TCHAR *func = (TCHAR *) HeapAlloc(GetProcessHeap(), 0, funclen * sizeof(TCHAR));
   if (func) {
-    if (_snprintf_s(func, funclen, _TRUNCATE, "%s()", function_name) > -1) function = func;
+    if (_sntprintf_s(func, funclen, _TRUNCATE, _T("%s()"), function_name) > -1) function = func;
   }
 
-  _snprintf_s(timeout_milliseconds, sizeof(timeout_milliseconds), _TRUNCATE, "%lu", timeout);
+  _sntprintf_s(timeout_milliseconds, _countof(timeout_milliseconds), _TRUNCATE, _T("%lu"), timeout);
 
   waithint = service->status.dwWaitHint;
   waited = 0;
@@ -727,8 +729,8 @@ int await_shutdown(nssm_service_t *service, char *function_name, unsigned long t
     SetServiceStatus(service->status_handle, &service->status);
 
     if (waited) {
-      _snprintf_s(waited_milliseconds, sizeof(waited_milliseconds), _TRUNCATE, "%lu", waited);
-      _snprintf_s(interval_milliseconds, sizeof(interval_milliseconds), _TRUNCATE, "%lu", interval);
+      _sntprintf_s(waited_milliseconds, _countof(waited_milliseconds), _TRUNCATE, _T("%lu"), waited);
+      _sntprintf_s(interval_milliseconds, _countof(interval_milliseconds), _TRUNCATE, _T("%lu"), interval);
       log_event(EVENTLOG_INFORMATION_TYPE, NSSM_EVENT_AWAITING_SHUTDOWN, function, service->name, waited_milliseconds, interval_milliseconds, timeout_milliseconds, 0);
     }
 
diff --git a/service.h b/service.h
index bb44a41..c9824d4 100644
--- a/service.h
+++ b/service.h
@@ -17,23 +17,23 @@
 #define ACTION_LEN 16
 
 typedef struct {
-  char name[SERVICE_NAME_LENGTH];
-  char exe[EXE_LENGTH];
-  char flags[VALUE_LENGTH];
-  char dir[MAX_PATH];
-  char *env;
+  TCHAR name[SERVICE_NAME_LENGTH];
+  TCHAR exe[EXE_LENGTH];
+  TCHAR flags[VALUE_LENGTH];
+  TCHAR dir[MAX_PATH];
+  TCHAR *env;
   unsigned long envlen;
-  char *env_extra;
+  TCHAR *env_extra;
   unsigned long env_extralen;
-  char stdin_path[MAX_PATH];
+  TCHAR stdin_path[MAX_PATH];
   unsigned long stdin_sharing;
   unsigned long stdin_disposition;
   unsigned long stdin_flags;
-  char stdout_path[MAX_PATH];
+  TCHAR stdout_path[MAX_PATH];
   unsigned long stdout_sharing;
   unsigned long stdout_disposition;
   unsigned long stdout_flags;
-  char stderr_path[MAX_PATH];
+  TCHAR stderr_path[MAX_PATH];
   unsigned long stderr_sharing;
   unsigned long stderr_disposition;
   unsigned long stderr_flags;
@@ -61,17 +61,17 @@ typedef struct {
   FILETIME exit_time;
 } nssm_service_t;
 
-void WINAPI service_main(unsigned long, char **);
-char *service_control_text(unsigned long);
-void log_service_control(char *, unsigned long, bool);
+void WINAPI service_main(unsigned long, TCHAR **);
+TCHAR *service_control_text(unsigned long);
+void log_service_control(TCHAR *, unsigned long, bool);
 unsigned long WINAPI service_control_handler(unsigned long, unsigned long, void *, void *);
 
 nssm_service_t *alloc_nssm_service();
 void set_nssm_service_defaults(nssm_service_t *);
 void cleanup_nssm_service(nssm_service_t *);
 SC_HANDLE open_service_manager();
-int pre_install_service(int, char **);
-int pre_remove_service(int, char **);
+int pre_install_service(int, TCHAR **);
+int pre_remove_service(int, TCHAR **);
 int install_service(nssm_service_t *);
 int remove_service(nssm_service_t *);
 void set_service_recovery(nssm_service_t *);
@@ -80,6 +80,6 @@ int start_service(nssm_service_t *);
 int stop_service(nssm_service_t *, unsigned long, bool, bool);
 void CALLBACK end_service(void *, unsigned char);
 void throttle_restart(nssm_service_t *);
-int await_shutdown(nssm_service_t *, char *, unsigned long);
+int await_shutdown(nssm_service_t *, TCHAR *, unsigned long);
 
 #endif